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Evolution of hierarchically-layered Cu-rich silicide nano-architectures

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posted on 2021-01-08, 11:49 authored by Ibrahim Saana Amiinu, Nilotpal Kapuria, Temilade Esther Adegoke, Angelika Holzinger, HUGH GEANEYHUGH GEANEY, Micheál D. Scanlon, Kevin M. RyanKevin M. Ryan
A solution based synthesis of well-ordered Cu-rich silicide nano-architectures, consisting of a pair of layered cups and stems (ρ-Cu15Si4 ) is demonstrated. The as-grown ρ-Cu15Si4 typically exhibits distinct interconnected 1D stems, consisting of a stack of nanorods (∼300 nm in length), terminated with concave hexagonal 3D cups that evolve through a self-regulated layer-bylayer growth mechanism. Discrete-time ex situ experimental observations reveal that the ρ-Cu15Si4 evolution is driven by interatomic diffusion, initially triggering the formation of binary-phase silicide islands (spheres) followed by the formation of hexagonal discs, stem growth, and lateral elongation in exactly opposite directions. It is further shown that electrochemically pre-grown Cu-crystals can facilitate direct growth of the ρ-Cu15Si4 in high yield with enhanced substrate coverage.

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History

Publication

Crystal Growth and Design;20 (10), pp. 6677-6682

Publisher

American Chemical Society

Note

peer-reviewed

Other Funding information

Horizon 2020, European Union (EU), ERC, SFI, IRC, Marie Curie-Sklodowska Action (MCSA)

Rights

© 2020 ACS This document is the Accepted Manuscript version of a Published Work that appeared in final form in Crystal Growth and Design, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.cgd.0c00833

Language

English

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